Abstract
The temporal and spatial distribution characteristics of wind power and photovoltaic output are complementary to a certain extent, which can stabilize the volatility of single new energy power generation to a certain extent and improve the ability of the grid to absorb new energy. This paper aims to study the joint planning method of power transmission and distribution network considering the complementary characteristics of wind-solar time and space. First, a wind-solar joint distribution model based on the time-varying Copula theory is established, and a wind-solar output simulation method considering the complementary characteristics of time and space is proposed. Then, taking the system investment and new energy consumption capacity as the optimization goals, and taking the system power balance, line transmission capacity, conventional generator set output and climbing capacity as constraints, the joint planning model of transmission and distribution network is established. At last, the analysis of calculation examples proves that the joint planning model of transmission and distribution network considering the complementary characteristics of wind-solar time and space can significantly improve the capacity of the grid to absorb new energy.
Highlights
As the proportion of new energy sources in the power structure continues to increase, its impact on the safe and stable operation of the power system has become increasingly significant
Since the temporal and spatial distribution of wind power and photovoltaic power output is complementary to a certain extent, it can smooth the volatility of a single new energy generation
This paper aims to study the joint planning method of transmission and distribution network considering the complementary characteristics of wind-solar time and space
Summary
As the proportion of new energy sources in the power structure continues to increase, its impact on the safe and stable operation of the power system has become increasingly significant. Literature [4,5,6] described the relevance of wind power based on the Copula theory, and proposed a source network planning method with the goal of optimal economy, without considering the complementary output of wind farms and photovoltaic power plants. Taking the system investment and new energy consumption capacity as the optimization goals, and taking the system power balance, line transmission capacity, conventional generator set output and climbing capacity as constraints, the joint planning model of transmission and distribution network is established. The analysis of calculation examples proves that the joint planning model of transmission and distribution network considering the complementary characteristics of wind-solar time and space can significantly improve the capacity of the grid to absorb new energy
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